Παραπομπή APA

Brown, L. R. (1997). State of the world 1997: A Worldwatch Institute report on progress towards a sustainable society. London: Earthscan Publications Ltd.

Παραπομπή Chicago Style

Brown, Lester R. State of the World 1997: A Worldwatch Institute Report On Progress Towards a Sustainable Society. London: Earthscan Publications Ltd, 1997.

Παραπομπή MLA

Brown, Lester R. State of the World 1997: A Worldwatch Institute Report On Progress Towards a Sustainable Society. London: Earthscan Publications Ltd, 1997.

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